SPECS: Weight: 2.9 oz. Dimensions: 7.3 in. L x 1.7 in. W x 1.7 in. H DESIGN & DETAILS: Travel water purifier Purifies water using UV light - safely, effectively and without the use of chemicals Does not add any aftertaste or odor Destroys more than 99.9% of bacteria, viruses and protozoan cysts UV water purifier can purify up to 200 half-liter servings of water using one set of AA lithium batteries Fits perfectly into commercial water bottles Forms a seal over the top of water bottles so you can purify in the original container Provides safe drinking water in less than a minute Powered by 4 AA batteries: Lithium or nickel metal hydride are strongly recommended Certified safe and effective by the Water Quality Association Model: AQ-MP-EF TECH SPECS: Output: 32 fl. oz. per 90 seconds UV lamp life: 3,000 liters of water purification